Attachable lifting arm for bulldozer blades



L... R. BROOK 2,473,505

ATTACHABLE LIFTING ARM FOR BULLDOZER BLADES Hume 21, 1949.

2 Shets-Sheet 1 Filed July 10, 1945 INVENTOR. LOUIS R. BROOK ATTORN EYE L. R. BROCK ATTACK-[ABLE LIFTING ARE FOR BULLDOZER BLADES Filed July 10, 1945 2 Sheets-Sheet 2 I lllvl INVENTOR. LOUIS R. BROOK ATTORN EYS Patented June 21, 1949 ATTACHABLE LIFTING ARM ron BULLDOZER BLADES Louis B. Brock, Hague, N. Y. Application July 10, 1945, Serial No. 604,284 6 Claims. (Cl. 214-131) (Granted under the act a March 3, 1883, as

amended April 30,

The invention described herein may he manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention relates generally to lifting devices, and more particularly to attachable and detachable lifting arms for attachment to a bull dozer blade.

All devices of this character, made according to the teachings of the prior art, and with which I am familiar, have been built solely as load lifting devices. No means has been heretofore provided for changing a bull dozer blade into a device for lifting heavy materiel from the ground.

It is, accordingly, an object of my invention to provide attachable and detachable lifting arms for a bull dozer blade, which are simple in construction, efficient in operation, economical in cost, and with the ability to carry heavy loads.

Other objects of my invention will become evident from the following detailed description, taken in conjunction with the accompanying drawings, in which:

Figure 1 is a side elevational view of my novel lifting member with attached brackets;

Figure 2 is an end elevational view from the front side of my novel lifting member;

Figure 3 is an enlarged view taken on the line 3-3 of Figure 1;

Figure 4 is a side elevational view of another 30 form of my novel lifting tines for attachment to the cutting edge and the bottom side of a bull dozer blade;

Figure 5 is a side elevational view of another form of my novel lifting tines for attachment to a bull dozer blade;

Figure 6 is a perspective view of the lifting tine shown in Figure 5; and

Figure '7 is a perspective view of another form of my novel lifting member.

Referring to the drawings, Figures 1, 2 and 3 show a built up lifting arm or tine I having an upwardly sloping bottom portion 2 at the front bottom portion thereof forminga point 3 at the front end thereof. An upwardly extending bracket 4 having an aperture 5 is attached to the rear top side of the tine I for attachment to a corresponding bracket 6 on the rear bottom side of a bull dozer blade I by pin 8, secured by cotter pins 9. An upwardly extending arm I having outwardly extending lugs II arid l2 on the ends thereof is connected to ears I3 and I4 on the top side of the bull dozer blade I by pin I5. secured by cotter pins I8, and to the tine I by means of a pin l'l secured by cotter pins I8.

In attaching or detaching this form of tine structure, the rear end of the tine I can be pivoted on pin 8, or pins I or II.

Figure 4 shows a tine 20 similar to the tine I in Figure 1 with an upwardy extending bracket 2I with an aperture 22, extending from the rear upper surface thereof. Pin 23, secured by cotter pin 24, attaches the bracket 2| and time 20 to a bracket 25 on the rear bottom side of the bull dozer blade 26. The cutting edge 21 of the bull dozer blade 23 has a V-shaped female hook portion 28 for receiving the V-shaped male hook portion 29 on arm 30 having an aperture for attachment to the tine 20 by a pin 3|, secured by cotter pins 32. The only difference between this conx'struction and that shown in Figure 1 is the difference between the arms Ill and 30.

Figures 5 and6 show another form of lifting tine wherein a lifting tine 40 of a shape similar to those previously described has a link 4| pivotally connected to tine 40 at 42 and to a bracket 44 on bull dozer blade 45 at 46. An upwardly extending supporting arm 41 is attached to the side of the tine 40 :by welding or otherwise and has a hook portion 48 on the upper end thereof for fitting over the top side of the bull dozer blade 45. The lifting arm 41 is fixed but pivotal movement of the tine 40 is obtained through hook portion 48, when link H is detached at 42 or 46. Figure 7 shows another form of lifting tine 50 wherein flat bar stock is bent as shown with a hook portion SI for fitting over the top of the bull .dozer blade 60. A strap 52 has a hooked portion 53 and is detachably fastened to tine 50 at 54 by bolting or any other suitable method. The strap 52 retains the tine 50 in position by bearing against the bottom and rear surfaces of the bull dozer blade 60;

It will be seen from the foregoing that I have provided novel lifting tines and means connected therewith for attaching them to a bull dozer blade wherein a bull dozer blade may be utilized for lifting heavy articles in the field where no lifting equipment is accessible. This is of particular importance at the present time in that bull dozers are used in the field, and they may be easily and quickly equipped with lifting forks as disclosed in this application to provide lifting means for heavy articles. The tines are particularly important in that they can be forced into the earth imder a heavy load in the field and lift it thererom.

Various changes may be made in the specific 55 embodiment of my invention without departing a from the spirit thereof, appended claims.

or from the scope of the What 1 claim m 1. A lifting fork forattachment to a bull dozer blade comprising a fork member, an upwardly extending bracket on the rear end of said fork member for attachment toa bull dozer blade, and an upwardly extending arm pivotally connected to said fork member adapted for pivotal connection to said bull dozer blade.

2. An attachable lifting fork for'attachment to a bull dozer blade having a female hook portion comprising a fork member, brackets extending upwardly from the rear upper surface thereof for pivotal connection to the bottom of said bull dozer blade, and an upwardly extending arm connected to said fork member having a hook portion for engaging the female hookportion on said bull dozer blade.

s. An'attachable'lifting fork 'member for a bull I dozer blade. comprising a fork member; anupwardly extending arm on-said fork member having a hook portion adapted to hook over the top portion of a bull dozer blade, and an attaching member for pivotally connecting the rear end of said fork memberto saidbull dozer: blade.

' 4. A lifting fork for attachment to a bull dozer blade comprising; a fork member, means on the rear end of saidifork member for pivotal attachment to a bu'll dozer blade, an upwardly extend- Number Name Date 2,281,928 Fletcher May 5, 1942' 2,300,801 Parker Nov. 3, 1942 2,348,899 Gulgnard et al. May 16, 19441 2,384,957

in: arm connected to said fork member. and

detachably connecting the rear end of. said tinev to said blade.

6. .The combination as set forth in claim 5 wherein at least one of said attachment means includes a pivotal connection.-

. LOUIS R. BROCK.

REFERENCES CITED 1 The following references are'of record in the file of this patent:

UNITED STATES PATEN S Murphy Sept. 18, 1945 1 

